An optical characteristic measurement device includes a photodetector and a processor. A device component and a pad electrode connected with the device component are formed on a semiconductor substrate. The first sheet and the second sheet each have a substantially equal pre-shrinking length, and are joined so as to create at least two openings therebetween. The concentration of the analyte in the ocular fluid, in turn, inidicates the concentration of the analyte in a fluid or tissue sample of the body, such as blood or intracellular fluid. The pattern may be expressed using extensible markup language and regular expressions to form a compact and precise notation for the pattern. Attachment unifying the panels comprises a method where corrugation can expand freely and prevent material failure; the method comprises fixing attachment not restraining two or more of the corrugation panels expandable parts.